DTC B1502-H
Precautions: Precautions for Diagnosing Trouble · General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
B1502-H: Inside Air Temperature Sensor and/or Its Circuit Malfunction Signal voltage of position sensor in inside air temperature sensor is higher than specified value (4.9 V) for specified time continuously. |
•Inside air temperature sensor circuit
•Inside air temperature sensor •HVAC control module |
Circuit Diagram
| [A]: | HVAC control module connector (View: [a]) | A2. | Ground for sensors circuit | 2. | HVAC control module |
| A1. | Inside air temperature sensor signal circuit | 1. | Inside air temperature sensor |
DTC Confirmation Procedure
1)Start engine and operate A/C system.
DTC Troubleshooting
NOTE:
When DTC B1504-H is indicated together, it is possible that sensor ground circuit is open.
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Scan tool parameter check
1)Check “Cabin Temperature” using “Data list” mode on SUZUKI scan tool.
Is temperature below –40 °C (–40 °F)?
|
Go to Step 2.
|
Intermittent trouble.
|
| 2 |
Inside air temperature sensor signal circuit check
1)Disconnect inside air temperature sensor connector.
2)Connect “A1” and “A2” circuit terminals of inside air temperature sensor connector using service wire.
3)Check “Cabin Temperature” using “Data list” mode on SUZUKI scan tool.
Is temperature below –40 °C (–40 °F)?
|
Go to Step 3.
|
Replace inside air temperature sensor.
|
| 3 |
Inside air temperature sensor signal circuit check
1)Connect “A1” and “A2” circuit terminals of “G20” connector using service wire.
2)Check “Cabin Temperature” using “Data list” mode on SUZUKI scan tool.
Is temperature below –40 °C (–40 °F)?
|
Replace HVAC control module and recheck DTC.
|
Replace instrument panel harness.
|